Friction draft-rigging.



APPLIOMLON H LBD Jums' g1;- 1912.

Patented Mar. 2, 1915.

z SHEETS-SHEET 1 x J. 4. E1@

|.|r .1|l Inti uw n E, -Iflhwi m w 1 l H im H| IHNI ...HH f Il .f M H -m w;x Irl Il 1 /s f n 5m a l, Mu Q .rMAAAAAAAAAMAAI/W/f/l//l//l//l//f u A x 1 u J x 1 A @am .Nm Q ww Q uf@ m 2 To alfwwm 'itl may concern intarsio sravfrssraranr onrein.I

y animer n. soiarrrn'r, or CLEVELAND, or'rro, Assenoia .To THE NATIONAL MALLEABLE cns'rmes 4ooi/naaien, or CLEVELAND, oHIo, Agoonfrona'rron 'or' oHIo.

Be it known. that L ERNEs'r ll.. Sommer,

a citizen 'of the Unitedv States, and a resident of Cleveland, Cuyahoga county, Ohio, have invented-new and useful Improvements in Friction Uraft-Rigging, of which the following is 'a specification, 'reference being rhad to the accompanying drawings, in which- Y ldigure 1 is a plan view partly in section v'showing my device applied to the framing of acar; Fig- 21s a section on lines II-H of Fig. 1; Fig'. 3 is a section on vlines .lll-will. of Fig.- 1; land Fig. 4 is an end 'iliew lpartly in 'section'on lines V-IV of ilg, I

- My' invention relates to friction draft rigging and is especially designed for use 'upon -lrailroa'd cars of such construction that the draft 'rigging must have a minimum vertical depth. Atthe same time myimproved rigging is adequate for' absorbing and dissipating to a very high degree the shocks of' putting and draft of the rolling stock now inservice on railways and which reduces to a minimum the damaging' .recoil shocks which are inherent'inn draft Yriggings now in use. 1 E

Referring to thedrawings, 2 indicates the housing having a central casing or chamber.

3, .p'. referably of cylindrical shape.' The' housing 2 has enlarged 'portions 4, preferably formed integral therewith, which are rectangular'in form and the' rear one of which is' adapted to abut against-the draft sill stops e which are attached to the draft 6 `of the car' structure. 7 isthe usual yolre within which the housing 2 lies, and

which is adapted to be bolted to the coupler/ -(not shown). The chamber 3 has a hardened steel bearing surface 8 which is held in the-chamber by the plate 9, and 'bearing against the surface V8 are segmental rings 10. Within these segmental rings 10 are the cone ringsll, which space apart the different sets of segmental.V rings 10 and Vbearing against the rear set of segments lis 'the equalizer follower 12. At the forward end. of. the chamber 3 is the front follower 13 havinga` rearward extension preferably integral therewith, which enters between the outer inclined .wedging faces of -the foremost set of segments 10. Abutting against this rearwardly extending portion 14: of the l front follower 13` is aV sleeve .15, against the the releasing spring 16..

' rnrc'rrolv DRAFT-mesme.

sesame@ of assurment. A. Patented May., 2,1915,

Application led .Tune '21, 1912. Serial No. 704,944; A

. rear. end of which bears the'releasin spring The sleeve 15 has a 4shoulder 1 1s adapted during 'the-releasing operation tol which strike againsty .the 'foremost cone 11.

The spring 16 at its rear end bears against 50 sidewise and inserted it lhears against the l05 rear of thecasing at the points 19, and in such position forms the rear bearing. for' The equalizer Afollower 12 has arms'20 20 extending at right angles to the axis of the 76 chamber 3,- whichv arms have apertures therem for the reception -of the plungers 21 21 which operate-in the supplementary chambers 22 22. The plungers21 21 have enlarged heads 23 23 at their forward ends, 75

and are secured at their rear ends to the varms 20 by means' ofthe `pins 24 24'.'

Upon the plungers 21 21 are coiled the springs 25 25 which bear at theirforward ends againstthe heads l23.23 and at their l rear ends against the rear walls of the supplementary chambers -22 22.

The operation of the draft rigging is 'as follows: When the coupler receives a buiing shock, this shock is transmitted through .the g5.

front follower 13 whichis caused to move rearwardly, driving its rearward extension back into the -casing 2, the rear end of the casing being held from rearward movement relative to the car by the rear draft sill stops whichare attached to the draft sills 6. The follower 13 transmits its pressure `by a wedging action to the foremost set of segments 10, and this pressure is 'trans-l mitted from one to the other throughout the ,entire series of' .cones and 'segmental' rings, and the entlre series 1s caused to move rearwardly-w1th1n' the casing as the front followerY 13 enters the forward end of the .carrying with it 'the equalizer fol- 10o casing, lower 12, the rearward movement of which is resisted by the springs 25 25', which bearl forwardly against the heads 23.23', and this resistance -is transmitted through the equalizer follower 12 tol the 4vrearmostfset of` 105 segments and to the cones and the other. sets of segments,

causing a powerful frictional engagement'between 'the exterior surfcelof the segmentalrings 10 and entire cylindrical' Spiagge 829i'. thepasglpg, ,thus ,exhausting .ther `11oinsee.;

force of the buihng shock. This frictionai engagement of thel segments and the interior surface of the casing increases progressively, since as the cones the segments 'move rearwardly in the casing the springs 25 25 bear with increasi pressure on the heads, and this pressure transmitted through the equalizer to the "various friction-.al ineniljaers as described. lil/Then the rigging under draft, the shock is transmitted to the yolre 7, causing it and the housing 2 to more forwardly as the front- :tollovcer i3 held against forward movement by the forward drali'tI sill 5. The forward action of the casing is resisted by the springs 25',

which force into Wedging engagement throuffh the canaliser follower l2 the cones and segments, the sanne relative movement and progressively increasing frictional engagement between the segments and the casing as "when the draft rigging is under a bulling shock. After bu'iing or draft, the releasing action of the spring 16 drives the sleeve 3'5 forward and with it the front follower 13, thus releasing the 'Wedging engagement between the follower and the foremost segmental ring. The shoulder i7 then strikes 'the foremost cone and releases it from Wedging engagement with the set of segments immediately to rear. As the greatest amount oi pressure is ea:-

` erted inthe forward part of the casing, it

is not necessariT to positively release the wedging engagement between the cones and segments further to the rear, since they will automatically release themselves the Wedging engagement of the foremost cones and segments has been relieved.

lft is obvious by this-construction that not only an eiicient and serviceable is provided, but also a device is obtained occupying a minimum of space. i

Many variations may be made in the form ving as l have described anc shown ein without departing from my inrention, since YWhat I claim is:

l. ln rictional shoclr absorbing niechanisni, a member having a longrudinally ex tending friction surface, sets of coasting friction shoes adapted to be wedged against said vfriction surface, Wedges interposed loetiifeen adjacent sets of friction shoes, said Wedges and sets oi shoes being' arranged alternati-ily and in tandem, compression springs arranged parallel to the iruigitudim nallir extending friction surface and enter .nally thereto, means for transmitting the pressure ci' said springs to the shoes and Wedges, said mean oinprismg,plunger members and. an een 9;. ln frictional f* nien., a casing, se Wedges arranged alternately fithin said. c.,

mecha shoes and and in tandem an equalizer member beine' adapte adapter; to transmit pressure to said' Wedges and shoes, supplementary 'longitudinally eli:- tending chambers Within the casing, springs Within the chambers, and plunger members connected at one -end to said equalizer, having abutments at their other ends bearing; against said springs. l

3. ln frictional shock absorbingfinechanisrn, a casing having a plurality of longitudinally extending chambers, Wedges and sets oi' friction shoes, arranged `alternatei-iV and in tandem Within one of said chambers, springs located in the other chambers, es, equalizer arranged in tandem with wedges and sets oi'shoes, and plunger nie if: bers operatively connecting the equalizer and said springs.

r.. In irictional 'shock absorbing tim-3c'g t nf m, a longitudinally extending friei. member, rictional parts bearing again; said friction member, comprising alten nat-ely arranged Wedges, and sets of shoes, springs arranged externally of said friction member and extending parallel thereto, and an equalizer member and plunger members eoacting therewith and adapted to transmit pressure from the springs to the frictional parts. i

5. ln a. draft' gear, a friction chamber, friction mechanism and springs therein, s':. ings Without said chamber, and means connecting said last mentioned springs with the friction mechanism, whereby said last mentioned springs assist to absorb hufling and draft strains transmitted to the friction mechanism, and also serve as a positive releasingmeans to return the friction mechanism to normal position when the strain is removed.

' v(i. lira draft gear, in'combination, a i'rien with, friction mechanism Within the i'ric- 3 tion chamber, springs Within the spring eli inbers, and means connecting the frietion mechar and the springs, said means to draw on the springs rearmovement of gear.

nr, in combination, a idrica open at both ends, spring cent thereto and substantialli'v erewith, friction mechanism 'L .tion chamber, springs Within vo L lg chambers, means connecting the friction. echanisrn and the said springs, said means being adapted to pull rear- Wardly on said springs in movement ci? Wardl in l;

ne chambers at the sides' 1 fgear."

9.` Ina draft gearlf'f'in combination, a friction chamber open vat -both ends, spring `chambers adjacent thereto and substantially coextensive therewith, friction mechanism Within the friction chamber, springs within said springy chambers, lmeans connecting the friction mechanism and the said springs, saidmeans beingextended within the friction chamber Aand adapted to pull rearwardly on said springs on movement of the ,10. In a draft tgear, a shell, a central -jfriction chamber, and adjacent substantially lcoextensive spring chambers in said shell,

connecting said spring seats and the fric- 20 tion mechanism, said means being adapted to-pull rearwardly on said movable spring seats on movement of the gear.

.n ERNEST H. SCHMIDT,

Witnesses:

HARRY E. ORB, R. L. LEHMAN. 

